Iterate completely through a Java array before doing else part of condition

Question

So the problem I'm running into is I want to test each part of an array against a condition, and if ALL the parts of the array return false I want to do something but if any of them return true I want to do something else. For example

  String[] arr = new String[8];
  for(String s : arr) {
    if(s.equalsIgnoreCase("example") {
      // Do this
    } else {
      // do that
    }
  }

The problem with the above is that is will do this or do that for all 8 pieces of the array. What I want is for it to test all of them, and if they're all false do that but if any of them are true then do this.

Bhesh Gurung · Accepted Answer · 2011-11-15 19:34:45Z

5

String[] arr = new String[8];
boolean isAllGood = true;
for(String s : arr) {
    if(!s.equalsIgnoreCase("example") {
        isAllGood = false;
        break;  
    } 
}

if(isAllGood) {
    //do this
} else {
    //do that
}

answered Nov 15, 2011 at 19:34

Bhesh Gurung

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1 Comment

Wagan8r Over a year ago

This example has the conditions backwards and won't work the way that is desired.

Wagan8r · Accepted Answer · 2011-11-15 19:44:40Z

3

The previous answer has the conditions backwards. It was testing if ANY is FALSE, "Do this" and if ALL are TRUE "Do that". Try this code:

String[] arr = new String[8];
boolean found = false;
for(String s : arr) {
    if(s.equalsIgnoreCase("example")) {
        found = true;
        break;
    }
}
if(found) {
    // Do this
} else {
    // Do that
}

answered Nov 15, 2011 at 19:44

Wagan8r

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2 Comments

CaldwellYSR Over a year ago

I literally just finished editing the other answer to reflect the conditions the correct way :P thanks

CaldwellYSR Over a year ago

That's because my edit needs to be peer reviewed... I'll mark this one as correct since it's correct without edits needed.

Mike Kwan · Accepted Answer · 2011-11-15 19:37:21Z

0

You should extract the loop to another function say isSomeCondition( String[] someArr )

answered Nov 15, 2011 at 19:37

Mike Kwan

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